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现在很多人开发wml的应用了，但它们毕竟都是些静态的内容。如果我们要开发和服务器交互的功能呢？答案当然是我们可以使用Servlet技术。

看下面的例子：
?xml version="1.0"?
DOCTYPE wml PUBLIC -//WAPFORUM//DTD WML 1.1//EN http://www.wapforum.org/DTD/wml_1.1.xml
 
wml
 
  card id= Order title= Query Inventory
  p
  select name= Items title= Items
  option value= Books Books /option
  option value= Music Music /option
  option value= Video Video /option
  option value= Software Software /option
  /select
  /p
  do type= accept label= Query
  go href= http://localhost:8080/ewap/wapservlet method= get
  postfield name= Items value= $(Items) /
  /go
  /do
  /card
/wml
用户可以从列表中选择Item,通过无线网络传输给服务器后Servlet通过request.getParameter()方法得到用户的选择并发送给用户，servlet的代码如下：

package com.j2medev.mingjava;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class WapServlet extends HttpServlet
{

  protected void doGet(HttpServletRequest request,
  HttpServletResponse response) throws ServletException, IOException
  {
  String select = request.getParameter( Items
  response.setContentType( text/vnd.wap.wml
  PrintWriter out = response.getWriter();
  out.println( ?xml version=/ 1.0/ ?
  out.println( !DOCTYPE wml PUBLIC/ -//WAPFORUM//DTD WML 1.1//EN/
  out.println( / http://www.wapforum.org/DTD/wml_1.1.xml/
  out.println( wml
  out.println( card title=/ test/
  out.println( p align=/ center/
  out.println( you selected +select);
  out.println( /p
  out.println( /card
  out.println( /wml

  }

  protected void doPost(HttpServletRequest request,
  HttpServletResponse response) throws ServletException, IOException
  {
  doGet(request,response);
  }
}

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